Bayer Aktiengesellschaft

Bayerwerk Aktiengesellschaft

Plumley and Tyner

Gunter Lorenz

Gunther Nischk

Eduard Radlmann

Heinz Schaffner

Alfred Nogaj

Carlhans Suling

Ulrich Reinehr

Siegfried Korte

Hans Uhlemann

Karlheinz Feltgen

Christian Pieper

Hans Wilsing

Klaus Nickel

Helmut Miller

The invention relates to gloss-stable modacrylic fibres and filaments comprising 50 to 84% of acrylonitrile, 15 to 48% of vinylidene chloride and 2 to 5% of an olefinically unsaturated sulphonic acid or salt thereof, all percentages being by weight, having a shrinkage in boiling water of at most 0.3%, a reduction in density on treatment with boiling water of no more than 0.015 g/cc and a scattered light component after boiling of at most 35 units compared with a BaSO.sub.4 standard of 1000 units, the increase brought about by treatment with boiling water amounting to no more than 30 units as well as to a process for their production.

Gloss-stable modacrylic fibres

The invention relates to a process for continuously removing residual solvent from filaments of dry-spun acrylonitrile polymers to values of below 2% by weight of solvent by a multi-stage hot-wash with low quantities of water.

Process for removing residual solvent from dry-spun filaments

The invention relates to highly shrinkable fibres or filaments of acrylonitrile polymers or copolymers which have a shrinkability of at least 35% and a fibre strength of at least 2 p/dtex. The invention relates further to a process for the production of these fibres or filaments.

Highly shrinkable acrylic fibres or filaments

The invention relates to a process for the production of solutions of substantially water-insoluble complex antimony compounds in polar organic solvents by esterifying an .alpha.-hydroxy polycarboxylic acid with a polyol, reacting an excess of the esterification product with an antimony oxide in a polar organic solvent and reacting the free carboxylic groups with a monoisocyanate.

Solutions of new antimony complexes

The invention relates to solutions of complex antimony compounds substantially insoluble in water which are produced by reacting antimony oxides with .alpha.-hydroxy carboxylic acids and further reaction with monoisocyanates as well as a process for the production of these solutions. The solutions according to the invention may be added to solutions of acrylonitrile polymers and copolymers and they improve the non-inflammability of shaped articles produced thereof.

Solutions of new complex antimony compounds

The invention relates to flame-proof copolymers of acrylonitrile and vinyl or vinylidene halide which contain from 0.1 to 5 % by weight of antimony in form of a water-insoluble amide-group containing antimony complex compound.

Substantially non-inflammable acrylonitrile polymers containing antimony

The invention relates to a composition of matter which comprises A) from 95 to 99.9 % by weight of a copolymer of acrylonitrile, a vinyl and/or vinylidene halide and, optionally, at least one other copolymerisable compound; and B) from 0.1 to 5 % by weight of a substantially water-insoluble complex antimony compound containing amide groups, the complex antimony compound being obtainable by esterifying an .alpha.-hydroxy polycarboxylic acid with a polyol, reacting the esterification product with an antimony oxide in a polar organic solvent adding a monoisocyanate to the resulting solution in such a quantity that the free carboxyl groups are converted into the corresponding amide groups, and a process for the production of these compositions of matter.

Substantially non-inflammable acrylonitrile copolymers containing

Vacuole-free films, filaments and fibers consisting of a polymer mixture which comprises a copolymer of acrylonitrile and a polymer which is obtained by a polymer-analogue reaction of a polyacrylic acid ester with dimethylamine, said polymer containing from 40-99 mol % of N,N-dimethyl acrylamide units.

Growing community of inventors

Dormagen, Germany

Gunter Lorenz